Improved gum-elastic coupling-spring



i UNIT D STATES: PATENTD SAMUEL M. noovnmor- UARLISLE, PENNSYLVANIA.

IMPROVED GUM-ELASTIC COUPLING-SPRING} -Snecificat ion forming part of Letters Patent No. 47.805, dated April 18,1?65.

1'0 all whom it may concern Be it known that I, SAMUEL M. HOOVER, of Garlisle, in the county of (lumber-land and State of Pennsylvania, have invented a new and "useful Improvement on a (Jami-Elastic Coupling-Spring; and Ido hereby declare that the following is a full, clear, and exact description of the construction and operation .of the same, reference beinghad to the an iiexed drawings, making a part of this spec fication. v

'Figure l is a longitudinal section showing the different parts when put together. The numbers 1 2 3 4 5, &c., represent sections of the rubberspring. Fig. 2 exhibits a perspective View of said spring, and Fig; 3 a

perspeetire view of the whole when finished for use.-

Iconstruct my spring by using vulcanized elastic rubber, inclosed in-a metallic case, and. divided in. sections 1 2 3 ,4, &c., as shown vin Fig. 1. The ease is of a cylindric form,

with a solid end, 0 e, pierced for the rod 2'' i,

' which runs through the entire length of the rubber spring. The end a of said rod is provided with a nut and washenlwhich rest on the rubber spring, as shown in the drawings.

B B is a cap which screws slightly on that part of the metal case.

This spring I usefor coupling railway-cars,

'connected' to the 'ho'oksGand D, or is used for starting and drawing cars, especially along curves and side1ings,alsofor plowing and simiv. ler uses, to prevent sudden. jerks and concus? sions when hitclied to horses. i

The workingof the spring can reedil be understood by referenceto Fig l'.

A counterextcnsioironG and D'Qwill act upon the washer at a, by means of the moving rod ii, and compre'ssthediflferent sections of 3 the rubber in proportion to theamount of force exerted. .Its unequal tension willproduce the desired vibratory motion.

I am aware that vulcanized rubber hasbeen used for springs, the various forms of which I do not claim, nor the manufacture orcomposition of the vulcanized rubber; but

ters Patent, isi The use of elastic-rubber inclosed'i n a me}; tallic case, constructed and: connected sub- ,stanti'ally as and for the'pur-poses specified) s nM'. Hooves,

Witnessesr HENRY HosLEa, v .-JOHN IRYLN. 1. i

What I claim, and desire to secured by Let? 

